Definition of Kellner in English:

Kellner

noun ˈkɛlnə

1Attributive Designating a compound eyepiece used especially for telescopes, consisting of a planoconvex field lens and an eye lens that is an achromatic doublet.
2A Kellner eyepiece.

Origin

Mid 19th century; earliest use found in Proceedings of the Royal Society of London. From the name of Karl Kellner, German optical instrument maker, who introduced the eyepiece in 1849.

Definition of Kellner in US English:

Kellner

nounˈkɛlnə

1Attributive Designating a compound eyepiece used especially for telescopes, consisting of a planoconvex field lens and an eye lens that is an achromatic doublet.
2A Kellner eyepiece.

Origin

Mid 19th century; earliest use found in Proceedings of the Royal Society of London. From the name of Karl Kellner, German optical instrument maker, who introduced the eyepiece in 1849.

词汇	Kellner
释义	Definition of Kellner in English: Kellner noun ˈkɛlnə 1Attributive Designating a compound eyepiece used especially for telescopes, consisting of a planoconvex field lens and an eye lens that is an achromatic doublet. 2A Kellner eyepiece. Origin Mid 19th century; earliest use found in Proceedings of the Royal Society of London. From the name of Karl Kellner, German optical instrument maker, who introduced the eyepiece in 1849. Definition of Kellner in US English: Kellner nounˈkɛlnə 1Attributive Designating a compound eyepiece used especially for telescopes, consisting of a planoconvex field lens and an eye lens that is an achromatic doublet. 2A Kellner eyepiece. Origin Mid 19th century; earliest use found in Proceedings of the Royal Society of London. From the name of Karl Kellner, German optical instrument maker, who introduced the eyepiece in 1849.
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